The heads are made for a very special V1L cylinder that I have not tested. The cylinder has a lip of 56mm...
The squishband needs to polished iMo as in my photos it takes 20 minutes do to the polishing.
That is my racing engine bottom end i blow up 3 cranks..:)
crazy rpms.. with that much metal removed.. the bike needs to spin @ 2,000 rpms atleast cost of blowdown.